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w B. SMITH. MANDREL FOR CORES 0F ROLL REWINDING MACHINES.

AP'PLiCATION FILED FEB. 5. 1915.

Patented Aug. 8, 1916.

2 SHEETS-SHEET I.

NJ Q

WITNESSES:

big v.35 B 7 TOR/VEV W. B. SMiTH.

MANDREL FOR CORES 0F RGLL REWINDING MACHINES.

APPLICATION man FEE-5.1915.

1 9 1 9%,2Q9, htented Aug. 8, 1916.

2 SHEETSSHEET 2.

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To all whom itma m p v,

Be it known thatl, WILLIAM Brown Y SMrrn, a citizen of the United States,-and a resident of Cama s, Clarke county, State' of Washington,have invented a new and useful Improvement. in Ma'ndrels for Cores ofRoll-Rewinding Machines, of whiehthejfollowing is a specification.

My inventionrelates to machines of the type described by me in aco-pending patent application for roll rewinding machine, filed -January 21, 1915, under Serial No. 3657.

he object of my invention is to provide the' mandrel with yieldingcore-grippers which can be retracted when the mandrel is to be loaded,and are projected when the mandrel is loadedwith cores, so as to holdthe latter against slipping on the mandrel.

j The core-grippers must, however," permit the 7 cores to slip somewhatwhen starting the rewinding process, for otherwise thestrip of materialmight tear,, and to-this end the core-grippers are made yielding.

It is further my object to arrange the core-grippers helically about themandrel, so as not to make the mandrel lop-sided or out of round, whichwould interfere with the efficient work of the mandrel.

A further feature of my invention consists in providing my mandrel withauto-.

matic core-'aliners which work oppositely to the core-grippers, being.projected when the core-grippers are retracted, which is, the

state of the latter when the mandrel is ed; Fig. 2 is apartial top viewof the rod carrying the core-grippers and reciprocable within themandrel for projecting and retracting the core-grippers; Fig. 3 is alarger sized sectional view of the left end of this mandrel. The fulllines of this figure show the core-grippers projected, while the brokenlines show the core grippers retracted; Fig.

' 4 is a view similar to Fig. 3 showing the right end of this mandrel;Fig. 5 is an end elevation of the mandrel, showing the helicalarrangement of the core-gripper n the Specification of Letters Patent.

v the mandrels used fonholding the blank cores of rewinder m'a-'chines,,being particularly adapted for usefon Mauritian ron oonnsor'noLL-nnwmnme meanness.

Patented-Aug. a, rare. Application fi ledl'ehruary 5, 1915. Serial Ito.6,382. i

mandrel for the purpose of properly positioning the cores on themandrel;Fig. 6 is an end elevation showing in diagram form one way 1n which mymandrel may be mounted and rotated; The mandrel .so far shown :bodyingmy invention. In this view cores are shown as mounted. on the-mandrel,the

core grippers of which are projected to hold the cores against slipping;Fig. 8 shows the same-type of mandrel with its core-grippers retracted;Fig. 9 is an enlarged cross-section on line 9'9 of Fig. 3 and Fig. 10 isa partial top view showing the left end of'the mandrels shown in Figs. 7and 8.

The mandrel as a whole is represented by a. It consists of acylindrical, partly hollowed-out body I) having circumferential,longitudinal slots 0, disposed helically about the body. These arecovered at one end-d, by a portion (1', the extremity of which isbeveled, asindicated by 0Z in Figs. 3 and 4:.

The right end of the body 6, is counterbored to receive a journal-end e,e, which is secured in place by the tapered-pin f. Such journal end isprovided with'an axial bore g, in which reciprocates one end of the rodh, carrying the core grippers z'. The coregrippers, z, are made of aflat-bow-shape spring pivoted at one end on pins j, located in a cavity70. The left end of the mandrel is also formed with a j ournal'end Z, asshown in Fig. 3. The mandrel is madeof any desired length. It may bemade of pieced construction, as shown. at m, in Fig. 3, for convenienceof manufacture; one .part having a dowel-end which fits thesocket of the other part. The rod it, extends in 'the'hollow. of

the body I), and is longitudinally movable' in the latter for thepurpose of projectlng and retracting the core-grippers t, as lllustratedin Figs. 3 and 4; the movement of the rod h, to the right retracting thecoregrippers, as shown by dotted lines, and the movement in the oppositedirection pro ecting the core-grippers. For heavy duty man drels I find1t convenient to provide means for moving the rod h.' The means shownconsist of a rack n,'provided at one end of the .rodh, and with whichmeshes a segmentpinion 0 formed on the lever 0, pivotingin a cavity 0 ofthe body I), on a pm 0. he extremity or head of the lever 0, has afinger-hole v. In order to lock the lever o in p ate, whe positioned topro ect the core lot grippers, its head is made with a cavity in whichprojects a spring controlled lock-pin g, from which the lever may,however, be readily disengaged by pulling it up.

further means for holding the rod 12., in position to retract thecore-grippers z, is provided by the expansion coil-spring 1', whichbears at one end on a collar 8, fixed on the rod k,,and at the other endagainst pins t, inserted through the tubular dowelend of the journal end6. I also provide my mandrel with a core aliner. This consists of acurved arm-u, pivoted in a cavity '2), and

' made with a head w. The rod h has a recess w in which the head of thearm u is normally seated by the action of the spring 3 The rod 71. has apin 2 which bears on the arm u when the rod 72 is moved to the left.Thus the core aliner and the core-grippers work oppositely to eachother, the one being projected when the other is retracted.

To lock the core aliner in place when retracted, it is made with a nose2 inserted in a cavity 3 of the'rod h. i

In Figs. 7 and 8 is shown the construction of my mandrel designed forlight duty. This mandrel consists of a tubular body 4, in both ends ofwhich are inserted journal ends 5, 6. The'journal end 5 is fastened inplace by a pin 7, but the journal end 6 1s movable and to it is fasteneda rod 8, which has longitudinal movement limited by the set-screw 10,inserted through a slot 11 of the tubular mandrel-body 4. The latter ismade with a plurality of slots 12, arranged helically about the body,and relatively to such slots the core-grippers are fastened at one endby pivots 14, in longitudinal space between the two bars 8* of which therod 8 is made. A detail of construction of the rod 8 is shown in Fig.10. It consists of two members 8,

as mentioned, spaced apart by the block 8 and the knuckles 13 of thecore-grippers 13, through which parts are inserted rivet pins 14 and 21.By seizing the journal-end 6 and pulling the same, and therewith the rod8, to the right, the core-grippers 13 are retracted within the tube body4, and by moving the rod 8 in an opposite directidn, the core-grippersare projected. They are shown in projected position in Fig. 7 and intheir retracted position in Fig. 8; and in Fig. 7, 15 represents coresbeing held in place by means of the core-grippers. This type of mandrelmay also be provided with a core-aliner, 16, which operatessubstantially in the same manner as the core-aliner in my mandrel forheavy duty. The core aliner 16 is normally controlled by a spring -17and is projected by a protrusion 18, on the rod 8. The core aliner '16is also made with a nose 19, which is inserted in a recess, or cavlty,20, of the rod 8, for holding the core-alinerin its retracted position.

one way of mounting my mandrel, when it it to be used in actual service.A Y standard 22, has journaled in its lower portion a drive-shaft 23,the driving means not being shown in this View, and'two driven shafts 24and 25. A gear 26 is fixed on the driveshaft 23, and gears 27 and 28 arefixed on the driven shafts 24 and 25 respectively. The gear 26 mesheswith and drives both gears 27 and 28 in the same direction. Fixed on theshafts 24 and 25 are the friction disks 29 and 30, and the bearing endsZ and e of the mandrel rest on said friction disks and said mandrel isdriven thereby.

The screws '10 in the head 20, of the aliner of the heavy-duty mandreland the screw 10 in the head of the aliner 16 of the light duty mandrel,form the stops against which the cores abut, and these stops areadjustable to take up variations in the cores.

I claim:

1. A mandrel having a plurality of circumferentially located yieldingvmovable core-grippers adapted to be arranged close to the periphery ofthe mandrel and to be i projected therefrom, and means for placing thecore-grippers in either of such positions.

2. A mandrel having a plurality of circumferentially and helicallylocated movable yielding core-grippers adapted to be arranged close tothe periphery of the mandrel and to be projected therefrom, and

means for placing the core-grippers in either of such positions. i

3. A mandrel having a plurality of cir-' cumferentially located movablecore-grippers adapted to be arranged close to the pe= riphery of themandrel and to be projected therefrom, means for placing the core-grippers in either such positions, a core-aliner pivoted in the cavitytherefor provided in the circumference of the mandrel, means fornormally holding the core-aliner retracted, the core-aliner havingoperative connection with said core-gripper placing means, and beingprojected by the movement of the latter in a direction .for retractingsaid coregrippers.

cumferentially located m vable, yielding 1 core-grippers adapted tov bearranged close tothe periphery of the mandrel and to be projectedtherefrom, a movable rod for plac- 7. A mandrel'comprising a hollow bodymade with a plurality of circumferentially located'slots, a rodlongitudinally movable in the mandrel b'ody, resilient core-grippersfastened at one 'end to said rod and, arranged relatively to saidcircumferential slots, and soas to be projected through the latter andretracted again by the corresponding movement of the rod, and means formoving the rod.

8. A mandrel comprising a hollow body made with a plurality ofcircumferentially,

helically located slots, a rod longitudinally movable in the mandrelbody, resllient bowshape core-grippers fastened at one end to said rodand arranged relatively to said circumferential slots, and so as to bepro-' jected through the latter, and retracted again by thecorresponding movement of the rod, and means for moving the rod.

9. A mandrel comprising a hollow body made with a plurality ofcircumferentially located slots, a rod longitudinally movable in themandrel .body, resilient bow-shape core-grippers fastened at one endatosaid rod and arrangedrelati'vely to said circumfer- .ential slots, andso as to be projected through the latter and retracted again by thecorresponding movement of the rod, and means for moving the rod. I

10. A mandrel comprising a hollow body made with a plurality ofcircumferentially,

helically located slots, a rod longitudinally movable in the mandrelbody, resllient coregrippers fastened at one end to said rod andarranged relatively to said circumferential n slots, and so as tobe'projected through the located slots, a rod longitudinally movable inthe mandrel body, resilient core-grippers fastened at one end to saidrod and arranged relatively to said circumferential slots, and

so as to be projected through the latter and retracted again by thecorresponding move ment of the rod, a spring arranged to-move lthe rodin the direction for projecting the core-grippers, and means for movingthe rod in the oppositedirection against the spring.

12. A mandrel comprising a hollow body made with a plurality'ofcircumferentially located slots, a, rod longitudinally movable 'in themandrel body, resilient core-grippers [fastened at one endto said rodand arranged relatively to said circumferential slots, and 1 so as to beprojected through the latter and retracted again by the correspondingmovement of the rod, 9. spring arranged to move the rod in the directionfor projecting the 1 core-grippers, anda pivoted lever engaging with the'rod and adapted for moving the latter against the spring.

13. A' mandrelcomprisin fastened at oneend to saidrod and arrangedrelativelyto said circumferential slots, and so as to be projectedthrough the latter and retracted again by thecorresponding movement ofthe rod, a spring arranged to move the rod in the direction forprojecting the core-grippers, and a rack-face provided on the rod, apivoted. lever made with a pinion segment meshing with said rack-facefor moving said rod against said spring.

14. A mandrel comprising a hollow body made with a plurality ofcircumferentially located slots, a'rod longitudinally movable in themandrel body, resilient core-grippers fastened at one end to said rodand arranged .relatively to said circumferential slots, and

so as to be projected through the latter and retracted again by thecorresponding movement of the rod, a spring arranged to move the rodin'the directlon for projecting the a hollow bodymade with a pluralityof circumferentiallyi "located slots, a rod longitudinally movable inthe mandrel body, resilient core-grippers core-grippers apivotedleverengaging with the rod and adapted for moving the latteragainst the spring, and means for locking the lever in place when thrownon its side.

15. A mandrel, comprisin a hollow body made with a plurality ofclrcumferentially located slots, a 'rod longitudinally movable in tliemandrel body,'resilient core-grippers ire fastened at oneend to said rodand arranged relatively to said circumferential slots, and so as to beprojected through the latter and retracted again by the correspondingmovement of the rod, means for moving the rod, a core-aliner pivoted inthe cavity therefor provided in the circumference of the mandrel, meansfor normally holding the core-aliner retracted, the corealiner havingoperative connection with the rod and being projected by the movement ofthe latter in the direction for retracting said core-grippers.

16. A mandrel comprising a hollow body made with a plurality ofcircumferentially located slots, a rod longitudinally movable in themandrel body, resilient core-grippers fastened at one end to said rodand arranged relatively to said circumferential slots, and so as to beprojected through the latter and retracted again by the correspondingmovement of the rod, means for moving the rod, a core-aliner pivoted inthe cavity therefor provided in the circumference of the mandrel,'aspring normally holding the core-aliner retracted, the core-alinerhaving operative connection with the rod and being projected by themovement ofthe latter in the direction for retracting saidcore-grippers. v

17 A mandrel comprising a hollow body made, with a pluralityofcircumferentially located slots, a rod longitudinally movable in themandrel body, resilient core-grippers fastened at one end to said rodand arranged relatively to said circumferential slots, and so as to beprojected through the latter and retracted again by the correspondingmovement ofthe rod, means for moving the rod an adjustable core-aliner'pivoted in the cavity therefor provided in the circumference of themandrel, means for normally holding the corealiner retracted,

the core-aliner having operative connection with the rod and beingprojected by the movement of the latter in the direction for retractingsaid core-grippers.

'18. A mandrel comprisin a hollow body made with a plurality ofcircumferentially located slots', a rod longitudinally movable acore-aliner pivoted in the cavity therefor provided in the circumferenceof the mandrel, means for normally holding the corealiner retracted, thecore-aliner having operative connection with the rod and being projectedby the movement of the latter in the direction for retracting saidcore-grippers,

and an adjustable abutment piece carried by the core-aliner.

WILLIAM BROWN SMITH. Witnesses:.

WM. E. SOEMI'IT, D. E. ORABB.

